Excavator.



' 11 V PATENTEDAUG.16,19O4.

- G. 11. WILLIAMS..

7 EXGAVATOR.

APPLICATION FILED AUG. 7. 1901. Rnnnwnn 11111. 13. 1904.

110 11011111.. a SHEETS-SHEET 1. v

No. 767,536. PATENTED MTG. 16, 1904. G. H. WILLIAMS.

EXGAVATOR.

APPLICATION FILE D AUG. 7. 1901. RENEWED JAR. 13 1904.

N0 MODEL. 2 SHEETS-SHEET 2.

Patenteol August 16, 1904.

GURDON H. WILLIAMS,

OF BROOKLYN TOWVNSHIP, CUYAHOGA COUNTY,

OHIO.

EXCAVATOR.

SPECIFICATION forming part of Letters Patent No. 767,536, dated August 16, 1904.

Application filed August 7, 1901. Renewed January 13, 1904:. Serial No. 188,925. (No model.)

To all whom, it may concern:

Be it known that I, GUnDoN H. WILLIAMs, a

citizen of the United States, residing in Brooklyn township, in the county of Ouyahoga and State of Ohio, have invented certain new and.

useful Improvements in Excavators; and I hereby declare the following to be a clear, full, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to excavating machinery, and more especially to the class wherein the excavating and transporting of the excavated material is accomplished by means of what is known as a crab-bucket or a bucket to receive the load, to close upon the load and retain it for transportation, and again release the load at the desired dumping grounds or place. The device is also designed and may be used as a loading and unloading machine where the material is of such a nature as to be handled by the bucket.

The object of my invention is to obtain a greater efficiency in the operation of the bucket, more positiveness in regard to the loading of the bucket and the opening and closing of the same, greater simplicity in the operation and managing of the machine as a whole, and less liability of disarrangement or breakage of any of the parts.

With the above object in View my invention consists in connecting the bucket to the end of a boom in such a manner that its vertical movement is entirelygoverned by the move- .ment of the boom, and the opening and closing enlarged view of the opening and closing mechamsm employed 1n con unctlonwith the Fig. III is avlew 1n eleexcavating-bucket.

said truck and also when desired and properly connected would transport the entire mechanism in any direction along a line of track O.

The construction of the turn-table, upon which the platform A rests and turns, is of the usual practical kind, with the exception that the assembling and disposing of the gearing may be slightly different in order .to accommodate itself to the special features and requirements of a machine of this character, such as having the pinion D meshing with an exterior annular track E, which in turn is secured to the truck B. The said pinion D is driven by suitable gear connection with the motive power and tends to revolve the platform A to the predetermined position.

Upon the platform A is mounted the motive power, consisting of suitable motor and winding-drums, brakes, and the like, the details of which it is not necessary to illustrate, as they are well known and are variously constructed according to requirements. This motive power embodies two winding-drums A and A and preferably where a steam-engine is used a boiler A said boiler being located diametrically opposite the boom of the machine and serves to act as a counterbalance to said boom. Mounted also upon the platform A is a framework comprising at the rear end suitable mountings for sheaves, such as F and F, for guiding the hoisting-cable G between the drum A and the framework of the boom. A short mast H is also mounted upon the platform A at its forward end, and

the whole is properly braced by struts and have a vertical rocking motion or movement which is controlled by the cable G and drum A. The boom J is tied and braced by struts j and tie-rods j, suitably disposed so as to attain the requisite strength needed. Extending from the pivotal connection H between the boom J and the mast H is an arm J ,Which is connected directly to said boom at its pivotal point and is strutted and tied in position by means of the upper tie-rod j and rear strut 7'. The strutting and tying of the arm J, however, is subject to the design, construction, or requirements of the machine. At the outer end of the boom J is pivotally attached a hanger K, the construction of which is more clearly illustrated in Figs. II and III of the drawings. This pivoted hanger K is secured at its lower end to bails Z Z, which in turn support and are pivotally attached to the jaws L L of the bucket at Z Z The jaws L L of the bucket are hinged together at their upper central portion, as at Z, preferably by means of a saddle-block L, (illustrated more clearly in Fig. V of the drawings,) the pintle Z acting as the pivots at either side of the bucket. The saddle-block L is in turn secured to the lower end of a rod M by means of a swivel connection. The upper end of rod M is connected to one or more sheaves M, which correspond and actin conjunction with one or more sheaves N, mounted at the end of the boom J at the upper end of the hanger K.

I prefer that the pin N, upon which the sheaves N are mounted, shall also act as the pivotal pin for attaching the hanger K to the end of the boom J. The sheaves M are so mounted and arranged as to have a vertical play within the hanger K, and as the said sheaves M are drawn toward the sheaves N by a cable 0, which connects with the drum A the jaws L L of the bucket are caused to close, thus scooping out and retaining the material for transportation. The action of the mechanism foropening and closing the bucket is clearly illustrated in Fig. II of the drawings, the solid lines showing the position of the mechanism when the bucket is closed and the dotted lines showing the position of the mechanism when the bucket is open. It will be seen by reference to Figs. II and III of the drawings that the action and mechanism in opening and closing the bucket is positive and dependent alone upon the action of the cable 0, in connection with the drum A and more especially is the action positive in the closing of the bucket, because the reactive strain against the pull of the cable O is borne by the hanger K through the bails Z Z, and inasmuch as the cable 0 has a direct purchase against the end of the boom and along its length the action of the bucket in digging is more firm and positive than where the bucket depends alone by cables.

In Fig. IV of the drawings I have illustrated my preferred swivel attachment P, whereby the bails Z Z are secured through pivots p 77 to the hanger K. This swivel attachment 1 engages the hanger at the part P in Fig. III, and thus allows the bucket to have horizontal movement in relation to said hanger and around the axis of the same, and thus accommodates itself to obstacles and circumstances attending excavations or loading.

The operation of my device is as follows: The machine being properly adjusted in location through the instrumentality of the truck B, tracks C, and platform A, the bucket L L is opened 'by slacking on the cable O. (See dotted lines in Fig. II.) The cable G is then run out, which allows the boom J to lower by vertically swinging on its pivotal point H. The lowering of the boomJ through the hanger K causes the bucket L L to engage the material to be loaded into said bucket, and the weight of said boom coming directly upon the hanger K forces the jaws of said bucket into the material, retains them there, whereupon the cable O is drawn in, closing the jaws of the bucket L L, as shown in solid lines, Fig. II, when the boom J is elevated at its outer end by drawing in the cable G, thus hoisting the loaded bucket, which is transported through the mechanism connected to the platform A to the place of deposit. pivoting the hanger K at the outer end of the boom the hanger and bucket will always retain a vertical position regardless of the angle of the boom, and the thrust upon the bucket is in a direct vertical line when the boom J is lowered.

It will be seen from the above description of mechanism and operation that a machine constructed according to my invention embodies an assemblage of parts constructed and located for the purpose of obtaining positive action, strength, and simplicity of operation and construction.

While I have in setting forth this invention gone into detail for the purpose of illustrating what I consider the best method of carrying out my invention, I do not wish to be understood as limiting my invention to these details, as one skilled in the art can and will modify certain constructive features and certain assemblage of parts without departing from the intent or scope of my invention.

What I claim is 1. In an excavator of the type set forth, a platform mounted for horizontal rotation on a movable truck, means for rotating said platform, a pivoted boom mounted on said platform and adapted for vertical movement, an excavating-bucket supported from the outer end of the boom by a hanger connected to the boom and bucket, means for supporting the bucket whereby rotary movement thereof may be permitted independently of the hanger and the boom, means connected to the bucket and operating independently of the boom-controlling means for opening and closing the bucket,

IO sheave mounted in its upper end, a rod eX- and boom-controlling means operated from the platform and connected-to an arm pivoted to the boom, substantially as described.

2. In an excavating-machine, the combination with a horizontally-rotatable platform mounted for movement with a truck, and means for imparting rotary movement to said platform, of a boom pivoted to said platform and having a vertical movement, a hanger pivoted in the outer end of said boom with a tending into the lower end of said hanger and carrying a sheave, a bucket pivoted to the lower end of said rod, said bucket and hanger maintaining a vertical position irrespective of the position of the boom, means connected to the sheave carried by the rod and operating over the sheave at the upper end of the hanger for controlling the opening and closing of the bucket, and separate means connected to the boom and operated from the platform for controlling said boom, substantially as described.

3. In combination with a suitably-mounted horizontally-rotating platform, and means'for rotating said platform, a boom pivoted on the platform and having a vertical movement, a hanger pivoted to the outer end of the boom with a vertically-movable rod mounted in its "lower end, a bucket pivotally supported from said rod, said bucket and hanger maintaining a vertical position irrespective of the positionof the boom, means'connected to the rod and operated from the platform for controlling the opening and closing of the bucket independently of the boom-controlling means, a boom-arm connected to the inner endof the boom, and boom-controlling means connected to said boom-arm and operated from the platform, substantially as described.

4. In combination with a suitably-mounted horizontally-rotatable platform, and means for rotating said platform, a boom pivoted on the platform, a hanger connected to the outer end of the boom, With a rod working through the lower end of the hanger, a bucket connected to the rod and swiveled to the hanger,

said bucket and hanger maintaining a vertical position irrespective of the boom, means connected to the rod and operated from the plat form forcontrolling the opening and closing of the bucket independently of the boom-controlling means, and means for controlling said boom, substantially as described.

' 5. In combination with a suitable platform, a boom pivoted on the platform, a hanger pivoted to the outer end of the boom, a bucket forth, embodying a pivoted boom, a boomarm connected to the inner end of said boom, means connected to said boom-arm for elevating and lowering said boom, a hanger con-- nected to the outer end of the boom, a bucket supported from the lower end of said hanger and having a rotary movement independent of the hanger, the bucket and hanger maintaining a vertical position irrespective of the position of the boom, and means for controlling the opening and closing of the bucket independently of the boom-controlling means, substantially as described.

7 An excavator of the type set forth, embodying a pivoted boom having a vertical movement, means for elevating and lowering said boom, a hanger pivoted to the outer end of said boom, and maintaining a vertical position irrespective of the position of the boom, a bucket rotatively connected to the lower end of said hanger, and a cable connected to a sheave carried by the bucket-support for independently controlling the opening and closing of the bucket, substantially as described.

Signed by me at Cleveland, in the county of Guyaho'ga and State of Ohio, this 13th day of April, 1901.

GURDON H. WILLIAMS.

Witnesses:

W; E. DONNELLY, E. B. DoNNELLY, 

